--What         if you don't finish your work on time? 
-- Mrs. Brown will be very angry.

A．happens B．is happened C．happened D．will happen

D

解析試題分析：句意:-如果你沒有按時完成你的作業(yè)會發(fā)生什么？-Brown先生會非常生氣的。happen是一個動詞，意思是發(fā)生。這個句子中if引導(dǎo)的是條件狀語從句，從句中使用一般現(xiàn)在時表示將來，主句用一般將來時。故選D。A是一般現(xiàn)在時；B選項形式不對，happen不能用于被動語態(tài)；C選項是一般過去時。
考點(diǎn)：考查動詞時態(tài)。

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